1 files changed, 17 insertions, 9 deletions

diff --git a/include/linux/bio.h b/include/linux/bio.h
index dc3cec386a99..1c91a176b9ae 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -136,25 +136,30 @@ struct bio {
  * bit 2 -- barrier
  *      Insert a serialization point in the IO queue, forcing previously
  *      submitted IO to be completed before this oen is issued.
- * bit 3 -- fail fast, don't want low level driver retries
- * bit 4 -- synchronous I/O hint: the block layer will unplug immediately
+ * bit 3 -- synchronous I/O hint: the block layer will unplug immediately
  *      Note that this does NOT indicate that the IO itself is sync, just
  *      that the block layer will not postpone issue of this IO by plugging.
- * bit 5 -- metadata request
+ * bit 4 -- metadata request
  *      Used for tracing to differentiate metadata and data IO. May also
  *      get some preferential treatment in the IO scheduler
- * bit 6 -- discard sectors
+ * bit 5 -- discard sectors
  *      Informs the lower level device that this range of sectors is no longer
  *      used by the file system and may thus be freed by the device. Used
  *      for flash based storage.
+ * bit 6 -- fail fast device errors
+ * bit 7 -- fail fast transport errors
+ * bit 8 -- fail fast driver errors
+ *      Don't want driver retries for any fast fail whatever the reason.
  */
 #define BIO_RW          0       /* Must match RW in req flags (blkdev.h) */
 #define BIO_RW_AHEAD    1       /* Must match FAILFAST in req flags */
 #define BIO_RW_BARRIER  2
-#define BIO_RW_FAILFAST 3
-#define BIO_RW_SYNC     4
-#define BIO_RW_META     5
-#define BIO_RW_DISCARD  6
+#define BIO_RW_SYNC     3
+#define BIO_RW_META     4
+#define BIO_RW_DISCARD  5
+#define BIO_RW_FAILFAST_DEV             6
+#define BIO_RW_FAILFAST_TRANSPORT       7
+#define BIO_RW_FAILFAST_DRIVER          8
 
 /*
  * upper 16 bits of bi_rw define the io priority of this bio
@@ -181,7 +186,10 @@ struct bio {
 #define bio_sectors(bio)        ((bio)->bi_size >> 9)
 #define bio_barrier(bio)        ((bio)->bi_rw & (1 << BIO_RW_BARRIER))
 #define bio_sync(bio)           ((bio)->bi_rw & (1 << BIO_RW_SYNC))
-#define bio_failfast(bio)       ((bio)->bi_rw & (1 << BIO_RW_FAILFAST))
+#define bio_failfast_dev(bio)   ((bio)->bi_rw & (1 << BIO_RW_FAILFAST_DEV))
+#define bio_failfast_transport(bio)     \
+        ((bio)->bi_rw & (1 << BIO_RW_FAILFAST_TRANSPORT))
+#define bio_failfast_driver(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST_DRIVER))
 #define bio_rw_ahead(bio)       ((bio)->bi_rw & (1 << BIO_RW_AHEAD))
 #define bio_rw_meta(bio)        ((bio)->bi_rw & (1 << BIO_RW_META))
 #define bio_discard(bio)        ((bio)->bi_rw & (1 << BIO_RW_DISCARD))